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  • TI Thinks Resolved

ADS42JB69: circuit model

Prodigy 40 points

Replies: 5

Views: 885

Part Number: ADS42JB69

I am trying to use the load impedance of the differential input lines of this part in a Keysight ADS simulation. What would be the best way to set this up?  I see no convenient circuit model is given, like other TI device datasheets have.  Thanks.

  • Hi Niral
    We are checking to see what information is available. Someone will respond in more detail soon.
    Best regards,
    Jim B
  • In reply to Jim Brinkhurst84999:

    Thanks.  Any update?

  • In reply to Niral patel:

    Hi Niral

    I've checked and there aren't any additional model details available for the analog inputs of this device. The only information I have found is that in Section 10.2.2.1 of the datasheet.

    I recommend you utilize one of the input matching networks shown in Figure 114 and 115 as needed for your particular signal frequency case.

    Best regards,

    Jim B

  • In reply to Jim Brinkhurst84999:

    Thank you for the reply. How would you recommend I model the differential load in ADS so that I can appropriately model my circuit?

    thanks,
    niral
  • In reply to Niral patel:

    Hi Niral

    I recommend the following:

    1) From Figure 112 generate a curve fitting equation for the resistance as a function of frequency.

    2) Using that equation create a frequency dependent impedance value in ADS. I have not done this myself, but found this discussion on-line that looks like it does what you need.

    Best regards,

    Jim B

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